Flexible drive



Ivre qta Y WQGHW VNME . NOV. 5

W. C. GRAY FLEXIBLE DRIVE Filed Jan.- 3, 1927 Patented Nov. 5, 1929 UNITED STATES WALLACE C. GRAY, OF ASSINIBOIA, SASKATCHEWAN, CANADA FLEXIBLE DRIVE Application lcd January 3, 1927, Serial No. 158,715, and in Canada April 30, 1926.

The invention relates to improvements in flexible drives and an object of the invention is to provide a flexible drive for operating an emery or carborundum stone and particularly adapted for use with emery stands as customarily found in garages and repair shops.

A further object is to construct the device so that it can be readily attached to the driving shaft of an cmery stand without requiring to alter the same.

With the above more important and other minor objects in view which will become more apparent as the description proceeds, the invention consists essentially in the arrangement and construction of parts hereinafter more particularly described, reference being had to the accompanying drawing, in which llig. 1 is a side view of an emery stand and showing my device attached thereto.

Fig. 2 is an enlarged detailed longitudinal sectional view through the appliance.

Fig. 3 is a perspective view of the supporting arm employed.

Fig. 4- is a vertical sectional view through the inturned end of the tool rest and showing the arm attached thereto.

In the drawing like characters of reference indicate corresponding parts in the several figures.

The emery stand which is of the conventional type presenting the customary standard 1, the base of which is suitably bolted to the floor, and the standard carries two aligned bearings 2 and 3 which support the armor spindle or driving shaft 4 which has the ends thereof oppositely screw threaded as indicated at 5 and 6. rThe customary emery stones 7 and 8 are mounted on the screw threaded ends of the shaft and held there in the ordinary manner by nuts 9. A driving pulley 10 is provided for rotating the shaft, a belt being applied thereon.

l1`he customary tool rest 11 is also part of 5 the machine equipment, this tool rest presenting an inturned portion 11 at the outer side of the wheel and being adj ustably carried by the tool rest support 11X.

The device which I provide is designed so that it can be readily screwed to the driving shaft 4 and attached to the tool rest.

reduced and screw threaded as indicated at 14, and the other end enlarged to provide a cylindrical head 15. The head is cored out and in ,it I place one end of the metallic cable 16, the cable being permanently secured to the head as by soldering as indicated at 17. Tothe other end of the cable I secure permanently, as by soldering, a sleeve 18 and spindle 13 is supplied, this having one end the sleeve terminates in a nut like head 19 interiorly screw threaded to receive the screw threaded end 6 of the arbor 4,.

A bearing sleeve 20 rotatably receives the spindle 13 and the head 15 and to the innerA `end of the sleeve I secure a short tube 21 within which one end of a flexible metallic casing 22 passes and to which 1t is suitably secured. The other end of the flexible cas- 'receive the inturned end 11 of the tool rest. yA tightening bolt 26 is supplied for effectively holding the arni 24 in place on the tool rest. kOn the reduced end 14 of the spindle I locate an emery or carborundum wheel 27 which is held in place by discs 28 and 29 and a fastening nut `30.

Vhen it is desired to use this device onA the customary emery stand, one simply catches and jams the hooked end of the arm 24 on the inturned end 11 of the tool rest and screws the nut 19 on the end 6 of the shaft 4. When thefshaft 4 is rotated in the ordina-ry manner the stone 27 is driven and can be used for doing a variety of work such as occurs in small machine shops and garages. The cable and casing thereof can be of any convenient length so as to give the device considerable range.

I am aware that flexible driving shafts have been used, but do not know of any device specilically constructed for quickly attaching to the customary ernery stand, and

ico

which can be manufactured at comparatively small cost so that it is available for the small shops.

Obviously the device could be with equal facility attached to either end of the emery stand. Vhen the device is in use, the flexible casing is held in place by hand, the bearing sleeve 23 acting as a support for the cable. At this time the casing pipe 2l and bea-ring sleeve 2O do not rotate as the cable rotating therewithin drives the spindle 13 and consequently the stone Q7.

What I claim as my invention is l. T he combination With the driving shaft and the tool rest of an emery stand, said tool rest presenting an inturned end extending towards the shaft, of a supporting arm positioned parallel to the shaft and having one end hooked to receive the inturned end of the tool rest and the other end provided with a bearing sleeve spaced from the end of the shaft and axially aligned therewith, means for clamping the hooked end of the arm to the tooi rest, a flexible metallic casing passing through the bearing sleeve and iirmly heid thereto and a driving cable passing through the flexible casing and detachably fastened to the end 01"' the shaft.

2. The combination With the driving shaft and the tool rest of an emery stand, said tool rest presenting an inturned end extending towards the shaft, of a supporting arm positioned parallel to the shaft and having one end hooked to receive the inturned end of the tool rest and the other end provided with a split bearing sleeve spaced from the end of the shaft and axially aligned therewith, a fastening bolt for clamping the hook to the arm, a flexible casing passing into the sleeve, a fastening bolt 'for clamping the sleeve to the casing and a metallic cable passing through the casing and detachablyfastened to the shaft to rotate therewith.

Signed at Assiniboia, Sask., this 20th day of September, 1926.

WALLACE C. GRAY. 

